Retrievable packer

Active Publication Date: 2016-06-23
SWELLFIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a packer assembly used in wellbore operations that can be easily removed with minimal force. The assembly has a deformable sleeve that can be sealed to prevent fluid flow and can deform radially inward to reduce the force required to withdraw the assembly. The packer can also have a chamber between rings to allow for deformation without a seal. Increasing the pulling force on the base pipe can disengage the deformable sleeve from the second end ring and allow for further deformation or collapse of the assembly. Overall, the invention provides an improved and effective tool for wellbore operations.

Problems solved by technology

Well intervention is, however, relatively expensive.
In the case of a conventional swellable packer, it may not be possible to reverse the swelling of the swellable sealing element to permit easy retrieval of the swellable packer.
Dragging a packer out of the wellbore in this way may cause disintegration of the sealing element.
In addition, debris may be generated in the wellbore which may be prejudicial to subsequent well measurements, observations and / or intervention operations.
Moreover, the friction forces may be considerable, thereby requiring the use of high pull forces.
Accordingly, dragging a conventional swellable packer out of a wellbore may be time-consuming and / or expensive.

Method used

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Examples

Experimental program
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Embodiment Construction

[0088]Terms such as “up”, “down”, “upward”, “downward”, “uphole”, “downhole”, “upper”, “lower” and the like are used below for ease of illustration only. One skilled in the art will understand that such terms are intended to refer to the particular orientation of the features shown, but are not intended to be limiting. For example, terms such as “up”, “upward”, “uphole” and “upper” may be used to refer to a direction along a wellbore towards a point of entry of the wellbore into a surface such as the ground or the seabed, whilst terms such as “down”, “downward”, “downhole” and “lower” may be used to refer to a direction along a wellbore away from the point of entry. As such, when a wellbore is deviated from the vertical, such terms may refer to a direction which differs significantly from a vertical direction and may even refer to a horizontal direction.

[0089]Referring initially to FIG. 1A there is shown a swellable packer assembly generally designated 2 located within a wellbore tu...

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Abstract

A retrievable packer device for use in a wellbore includes first and second end rings configured to be mounted on a base member and a deformable sleeve extending from the first end ring to the second end ring and configured to extend around the base member. A swellable sleeve is mounted on the deformable sleeve.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a retrievable packer device and a retrievable packer assembly for use in a wellbore, particularly though not exclusively, for use in a wellbore tubular or a borehole of an oil, gas or water well.BACKGROUND TO THE INVENTION[0002]It is well known to use packers for the purposes of sealing fluid flow paths in oil and gas wells such as oil and gas production wells and in water wells such as injection wells. For example, it is well known to sealingly mount such downhole packers on a base pipe and to prevent fluid flow along an annulus defined between an outer surface of the base pipe and an inner surface of a wellbore. Such downhole packers may, in particular, be used for isolating production zones in an oil or gas well. Such packers generally include a sealing element which, in use, exerts a sufficient pack-off force on an inner surface of the wellbore so as to provide an effective seal to fluid flow. Known downhole packers ma...

Claims

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Application Information

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IPC IPC(8): E21B33/128E21B33/127
CPCE21B33/1277E21B33/128E21B33/1208
Inventor VOLL, BENNHUFFER, BARRYMACKIE, COLINANDERSON, NEIL
Owner SWELLFIX
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